Seven shape toothbrush

Abstract

This toothbrush presents an independent base of support for the bristles. The bristles' base is positioned on the structure of the head of the toothbrush itself, in such a way that half of the base remains fixed to the head of the toothbrush structure, while the second half can be raised, giving to the whole base a curved-angle profile. A half of this base has this ability to be free to rise at an angle, driven by a sliding rod, which is pushed with a finger of the hand holding the toothbrush. The rod slides through an inclined opening placed underneath the head of the toothbrush. In order to return the base to its horizontal position, the rod itself is retracted, in the same way, using a finger of the hand holding the toothbrush. The lowering of the base itself is facilitated by the pressure of the toothbrush on the teeth.

I claim: 
     
       1. A toothbrush comprising:
 a handle and a toothbrush head both located along a longitudinal axis, wherein the toothbrush head comprises a flexible bristle base; 
 a plurality of bristles are fixed on the bristle base; 
 the bristle base is divided into a proximal half and a distal half; 
 the proximal half of the bristle base is located closest to the handle and the distal half of the bristle base is located at an opposite end of the toothbrush head; 
 the proximal half of the bristle base is fastened to the toothbrush head and the distal half of the bristle base is not attached to the toothbrush head; 
 a rear surface of the toothbrush head comprises an internal duct that extends at an angle to the longitudinal axis; 
 the duct extends from a rear opening on the rear surface of the toothbrush head to an upper opening on a top surface of the toothbrush head located underneath the distal half of the bristle base; 
 a rod having a width that is substantially equal to the width of the duct is received within the rear opening and is capable of sliding through the duct; 
 the rod has a length such a user can slide the rod with a finger, while holding the handle, from the rear opening of the duct to the upper opening; wherein 
 when the rod is pushed by the user through the duct and outwardly from the upper opening, it contacts and lifts the distal half of the bristle base to form a convex shape; 
 when the rod is retracted, the distal half of the bristle base is returned to a flat shape.